Screw Pump Repair

Screw Pump Repair on the Oil Tankers VIMSI and RISTNA

Challenge

Engineers discovered the screw housing gap had increased up to 3mm as a result ofradical abrasion and corrosion. The repair and maintenance work required had to becarried out quickly in order to get them fully operational with minimal downtime.

Furthermore, the precision required in the construction of screw pumps demanded very carefully installed coatings in order for the pumps to be fully functional.

Application

Repairs were carried out by screw finish machining, sandblasting of the housing andthen degreasing.

The housing was then restored using Devcon Titanium Putty, which was manuallymachined with the use of a control pattern. Ideal for providing chemical and abrasionresistant surfaces.

Result

Both pumps are now operating at 98-99% of their normal capacity and are protected from future corrosion. Another successful repair using Devcon products which helped the engineers to overcome the limitations of materials/parts and prolong the life of the equipment with minimal downtime and material costs.